Here's my biggest pet peeves with iTunes 10.5.0.45 x64 for Windows: 1. No wi-fi sync...but this is going to be released soon! 2. Adding files. Around 1/5 of the files I add have permission problems, solved by a restart of iTunes. Extremely annoying, considering I'm editing 400+ songs' tags. 3. Sync server. Crashes all the time, slows startup by 3 minutes. 4. Determining Audio Volume when adding files. 5. Incorrect maximum window size! Windows Snap to one side doesn't do this, though. iTunes 10.5.0.45 x32 1. Slow syncing, especially with apps, but this problem is made harmless with the ability to use the phone during syncs. If you have any other problems with the WINDOWS version of iTunes 10.5 beta 2, please tell us your version of iTunes (32- or 64-bit) and your problems!